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    Characteristics of Pool Boiling Bubble Dynamics in Bead Packed Porous Structures

    Source: Journal of Heat Transfer:;2011:;volume( 133 ):;issue: 003::page 31004
    Author:
    Calvin H. Li
    ,
    G. P. Peterson
    ,
    Ting Li
    ,
    Paul Hodgins
    DOI: 10.1115/1.4000952
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Spherical glass and copper beads have been used to create bead packed porous structures for an investigation of two-phase heat transfer bubble dynamics under geometric constraints. The results demonstrated a variety of bubble dynamics characteristics under a range of heating conditions. The bubble generation, growth, and detachment during the nucleate pool boiling heat transfer have been filmed, the heating surface temperatures and heat flux were recorded, and theoretical models have been employed to study bubble dynamic characteristics. Computer simulation results were combined with experimental observations to clarify the details of the vapor bubble growth process and the liquid water replenishing the inside of the porous structures. This investigation has clearly shown, with both experimental and computer simulation evidence, that the millimeter scale bead packed porous structures could greatly influence pool boiling heat transfer by forcing a single bubble to depart at a smaller size, as compared with that in a plain surface situation at low heat flux situations, and could trigger the earlier occurrence of critical heat flux by trapping the vapor into interstitial space and forming a vapor column net at high heat flux situations. The results also proved data for further development of theoretical models of pool boiling heat transfer in bead packed porous structures.
    keyword(s): Dynamics (Mechanics) , Bubbles , Heat flux , Heating AND Vapors ,
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      Characteristics of Pool Boiling Bubble Dynamics in Bead Packed Porous Structures

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/146749
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    contributor authorCalvin H. Li
    contributor authorG. P. Peterson
    contributor authorTing Li
    contributor authorPaul Hodgins
    date accessioned2017-05-09T00:45:08Z
    date available2017-05-09T00:45:08Z
    date copyrightMarch, 2011
    date issued2011
    identifier issn0022-1481
    identifier otherJHTRAO-27908#031004_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/146749
    description abstractSpherical glass and copper beads have been used to create bead packed porous structures for an investigation of two-phase heat transfer bubble dynamics under geometric constraints. The results demonstrated a variety of bubble dynamics characteristics under a range of heating conditions. The bubble generation, growth, and detachment during the nucleate pool boiling heat transfer have been filmed, the heating surface temperatures and heat flux were recorded, and theoretical models have been employed to study bubble dynamic characteristics. Computer simulation results were combined with experimental observations to clarify the details of the vapor bubble growth process and the liquid water replenishing the inside of the porous structures. This investigation has clearly shown, with both experimental and computer simulation evidence, that the millimeter scale bead packed porous structures could greatly influence pool boiling heat transfer by forcing a single bubble to depart at a smaller size, as compared with that in a plain surface situation at low heat flux situations, and could trigger the earlier occurrence of critical heat flux by trapping the vapor into interstitial space and forming a vapor column net at high heat flux situations. The results also proved data for further development of theoretical models of pool boiling heat transfer in bead packed porous structures.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleCharacteristics of Pool Boiling Bubble Dynamics in Bead Packed Porous Structures
    typeJournal Paper
    journal volume133
    journal issue3
    journal titleJournal of Heat Transfer
    identifier doi10.1115/1.4000952
    journal fristpage31004
    identifier eissn1528-8943
    keywordsDynamics (Mechanics)
    keywordsBubbles
    keywordsHeat flux
    keywordsHeating AND Vapors
    treeJournal of Heat Transfer:;2011:;volume( 133 ):;issue: 003
    contenttypeFulltext
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